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isogloss

[ahy-suh-glos, -glaws] /ˈaɪ səˌglɒs, -ˌglɔs/
noun
1.
(in the study of the geographical distribution of dialects) a line on a map marking the limits of an area within which a feature of speech occurs, as the use of a particular word or pronunciation.
Origin
< German (1892); see iso-, gloss2
Related forms
isoglossal, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for isogloss

isogloss

/ˈaɪsəʊˌɡlɒs/
noun
1.
a line drawn on a map around the area in which a linguistic feature is to be found, such as a particular pronunciation of a given word
Derived Forms
isoglossal, isoglottic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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9
11
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